地震地磁观测与研究2011，Vol.32Issue(4)：27-34,8.DOI:10.3969/j.issn.1003-3246.2011.04.006
全球电离层VLF电场功率谱特征
The global characteristics of VLF electric field frequency spectrum in ionosphere
摘要
Abstract
By analyzing the electric field power spectrum data observed by the DEMETER satellite during the time interval of March 2006 and February 2009, it is found that the characteristics of Electric field power spectrum of global ionosphere in DEMETER altitude are as follows-electric field emission is more stronger in the region with high latitude than that in the low latitude in average, furthermore, the electric field emission enhanced corresponding to several geomagnetic field abnormal regions; global electric field power spectrum intensity is stronger on the dayside than on the night side, stronger over the continents than over the ocean, stronger in the summer than in the equinoctial season, and the weakest in the winter; there exist prominent difference of electric field power spectrum in different frequency band, meanwhile, power spectrum distributes visibly along the magnetic shell index L shells or geomagnetic field intensity lines in some frequency bands; moreover, the global characteristics are more similar in the same season of different years. This global observation model will provide a basis for the study of ionosphere anomalies induced by seismic activity.关键词
DEMETER卫星观测/电离层/VLF电场功率谱/全球背景特征Key words
observations of DEMETER satellite/ ionosphere/ VLF electric field frequency spectrum/ global background characteristics引用本文复制引用
姚丽,陈化然,刘晓灿,何宇飞..全球电离层VLF电场功率谱特征[J].地震地磁观测与研究,2011,32(4):27-34,8.基金项目
国家科技支撑项目(2008BAC35B01) （2008BAC35B01）
中国科学院空间天气学国家重点实验室开放课题(08262DAA4S) （08262DAA4S）
中国地震局地球物理研究所基本科研专项(059902)共同资助 （059902）
